The Bigelow Next-Generation Commercial Space Station was a private orbital space station under conceptual development by Bigelow Aerospace in the 2000s and 2010s.[1] Previous concepts of the space station had included multiple modules, such as two B330 expandable spacecraft modules as well as a central docking node, propulsion, solar arrays, and attached crew capsules. However it was also suggested that each B330 can operate as an independent space station. Attaching a B330 to the International Space Station or flying a B330 alone have been suggested by Robert Bigelow.
On 8 April 2016, NASA launched a Bigelow inflatable module and attached it to the ISS, where it has been tested for over four years.